It is well known to all that water, ______ enough, can change into ice quickly．
A．if cooling B．though to be cooled
C．when cooled D．when is cooled
I would love ______ to the party that evening, but I had an unexpected visitor．
A．to go B．to have gone C．going D．having gone
Thomas _____ in inventing many electrical machines
A．was successful B．succeed C．was success D．successes
The Changjiang River has been polluted badly and is not good _______．
A．to swim it B．to be swum in
C．to swim in it D．to swim in
I think he must have seen me at the meeting last night, ______?
A．didn’t he B．don’t I
C．do I D．mustn’t he
The ______ look on his face suggested that he ______ that he would fail in the Maths test．
A．surprising; wouldn’t expect B．surprising; hadn’t expected
C．surprised; hadn’t expected D．surprised; shouldn’t expect
